90 



DISSECTION OF THE DOG 



n. perontsus_ 

 superficialis' 



-n. peronatus profundus 



_ n. cutaneus 

 dorsalis medialis 



Ramus lateralis 



' -Ramus medialis 



nn. digitals 



dorsales communes-^^—- -*^-/ 



II, III, et 17. ~~ l 



Fig. 35. — Diagram of nerves on the dorsum of the pes. 



phalangeal articulation. Here 

 the most lateral tendon is joined 

 by the tendon of the extensor of 

 the fifth digit ; the others by the 

 tendons of the extensor digitorum 

 brevis. The tendons are con- 

 nected with the capsules of the 

 metatarso-phalangeal and inter- 

 phalangeal joints, and on a level 

 with the first phalanx are joined 

 by slips from the tendons of 

 interosseous muscles. 



M. PERON^TJS LONGTTS. — 



Placed to the lateral side of the 

 foregoing, the long peroneal 

 muscle has origin from the lateral 

 collateral ligament, the lateral part 

 of the proximal end of the tibia 

 and the head of the fibula. Its 

 tendon runs over the lateral mal- 

 leolus, across the back of the tarsus 

 in a groove on the cuboid bone, 

 and is inserted into the base of the 

 first or second metatarsal bone. 



M. EXTENSOR DIGIT! QTJINTI. — 



This is a slender muscle partly 

 buried between the long peroneal 

 muscle and the deep flexor of the 

 digits. Its origin is from the 

 proximal half of the border of the 

 fibula. A thin tendon passes 

 down the leg in company with 

 that of the long peroneal muscle, 

 crosses under this tendon just 

 beyond the lateral malleolus, and 

 finally joins that slip from the 

 common extensor of the digits 

 which goes to the fifth digit. 



M. peron^us brevis. — The 

 short peroneal muscle arises from 

 the distal half or two-thirds of the 

 fibula, and is inserted into the base 

 of the fifth metatarsal bone. 



